Not long ago...
On New years day of 2017, my Guinea hen passed away.
April tenth of 2017 my Speckled Sussex had passed too.
Then around Easter my NH hen passed away.
On April 27 OF this year my other Guinea hen died.

I want to reduce the death.

Some people use thyme, Oregano and apple cider vinegar.
Are these good ideas for health?
If so, which one is more reasonable?